5061
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 7744
- Proper Divisor Sum (Aliquot Sum)
- 2683
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 2880
- Möbius Function
- -1
- Radical
- 5061
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 41
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Divisors of 2^24 - 1.at n=50A003532
- Coordination sequence T3 for Zeolite Code VET.at n=43A009904
- a(n) = floor( n*(n-1)*(n-2)/10 ).at n=38A011892
- Numbers k that divide s(k), where s(1)=1, s(j)=15*s(j-1)+j.at n=31A014865
- Generalized Fibonacci numbers: a(n) = a(n-1) + 10*a(n-2).at n=7A015446
- a(n) = n*(23*n - 1)/2.at n=21A022280
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 46.at n=30A031544
- a(n)=(s(n)+5)/10, where s(n)=n-th base 10 palindrome that starts with 5.at n=28A043084
- Centered 20-gonal (or icosagonal) numbers.at n=22A069133
- Numbers k that divide 2^(k+3) - 1.at n=30A069927
- Fifth root of n contains n as a string of digits to the immediate right of the decimal point (excluding leading zeros).at n=16A074762
- Start with 1057 and repeatedly reverse the digits and add 2 to get the next term.at n=4A120215
- Nonprimes k > 0 such that 6^k==6 (mod k).at n=38A122783
- a(n) = n*(n^2 + 2*n - 1)/2.at n=20A127736
- a(n) = n^4 - 10n^3 + 35n^2 - 48n + 23.at n=10A137864
- Wiener index of the prism graph Y_n on 2n nodes.at n=20A138179
- Number of hyperforests on n unlabeled nodes, assuming that each edge contains at least two nodes, with all components of prime orders.at n=10A144979
- Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1100-0111-0001 pattern in any orientation.at n=10A147276
- a(n+1)-+a(n)=prime, a(n+1)*a(n)=Average of twin prime pairs, a(1)=2,a(2)=9.at n=25A154495
- Number of slanted 2 X n (i=1..2) X (j=i..n+i-1) 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, 4 in the lower right corner, and with no element having more than 3 neighbors with the same value.at n=10A165394